Learn about allergic conjunctivitis and eye allergy symptoms, causes and treatments. Find out how to gain eye allergy relief from itchy, burning eyes.
Allergies not only affect the nasal passages, but can affect the eyes as well. Ocular allergy, or allergic conjunctivitis can cause itching, redness, lid swelling, tearing, light sensitivity, and swollen eyes. Eyes are especially vulnerable to allergens and irritants. Find out how you can find an eye allergy treatment for itchy eye relief.
http://www.blog.contactlensking.com/pinkeye-conjunctivitis.php Video Rating: / 5
In this video, Professor Dan Reinstein performs a ReLEx SMILE (small incision lenticule extraction) – a keyhole type of LASIK procedure – filmed in real-time to demonstrate the full 3 and-a-half minute procedure from multiple angles. The superior design and optical precision of the Carl Zeiss Meditec Visumax femtosecond makes it the only femtosecond laser that is accurate enough to perform laser eye surgery through a keyhole incision in the cornea without the need for creating a flap and disruption of the corneal nerves and tearfilm that results from flap creation in the standard LASIK technique. The patient is only in contact with the device is less than 40 seconds with extremely low contract force such that the patient feels effectively nothing, there are no red splodges (subconjunctival haemorages) left behind. From the surgeons’ standpoint the laser procedure is one step: contact with the patient cornea and lenticule creation. The accuracy of ReLEx SMILE has been shown to be higher than that of LASIK in that it is far more accurate for higher prescriptions, and ReLEx smile can perform treatment for myopia / short-sightedness from -1.00 to -10 and in some instances up to -14 D.
For more information about laser eye surgery and ReLEx smile (keyhole LASIK), please contact the London Vision Clinic on 020 7224 1005.
Do eye boogers play a crucial role in maintaining the overall health of our eyes, or are they just a gross inconvenience?
Is Eating Boogers Bad For You? – https://youtu.be/DUogCoSmPJo
Sign Up For The Seeker Newsletter Here – http://bit.ly/1UO1PxI
Read More:
Why Do We Get Sleep In Our Eyes?
http://www.bbc.com/future/story/20150428-why-do-we-get-sleep-in-our-eyes
“Blinking also helps the oily meibum and water tears mix together to form an emulsion called tear film. If you go for too long without blinking, the emulsion falls apart – oil and water don’t like to mix – and your cornea could become exposed to air. At best that’s uncomfortable – at worst, the chronic deterioration of the tear film could lead to a condition known as “dry eye” or, more technically, keratoconjunctivitis sicca.”
Here’s Why You Get Eye Boogers
http://www.attn.com/stories/7078/scientific-reason-why-you-get-eye-boogers%E2%80%8B
“Normally, you blink debris away during the day – and the older you are, the more you fight eye junk. Adults blink at a rate of about 20 per minute; babies only do it about twice per minute.”
The Structure and Assembly of Secreted Mucins
http://www.jbc.org/content/274/45/31751.full
“Mucins are major glycoprotein components of the mucous that coats the surfaces of cells lining the respiratory, digestive, and urogenital tracts, and in some amphibia, the skin. They function to protect epithelial cells from infection, dehydration, and physical or chemical injury, as well as to aid the passage of materials through a tract.”
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DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won’t find anywhere else! New videos daily.
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Written By: Molly Nevola Video Rating: / 5
Eye boogers: Not the most glamorous of bodily secretions, but important all the same. Learn why the heck you have sand in your eyes in the morning in this episode of Quick Questions.
Hosted by: Michael Aranda
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Sources:
http://www.nhs.uk/conditions/scars/Pages/Introduction.aspx
http://www.ncbi.nlm.nih.gov/books/NBK21582/
http://www.news-medical.net/health/What-is-Collagen.aspx
http://www.webmd.com/skin-problems-and-treatments/scars
http://www.huffingtonpost.com/robert-tornambe-md/scar-treatment-_b_830479.html
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3038392/
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2918339/
http://www.aafp.org/afp/2009/0801/p253.html Video Rating: / 5
http://www.nucleushealth.com/ – This medical animation depicts Laser Eye Surgery, a procedure that permanently changes the shape of the cornea, the clear covering over the front of the eye.
Next stop in our tour of your sensory systems? VISION. With a little help from an optical illusion, we take a look inside your eyes to try to figure out how your sense of vision works — and how it can be tricked.
Pssst… we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Table of Contents
The Structure of the Eye 2:31
The Fibrous, Vascular, and Inner Layers 3:33.2
The Retina 4:56
Photoreceptors, Bipolar Cells, and Ganglion Neurons 5:09.2
Rods and Cones 6:07.5
***
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Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
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CC Kids: http://www.youtube.com/crashcoursekids Video Rating: / 5
buy my clothes on depop –
https://depop.app.link/2NMngTjCk2
MAKEUP PRODUCTS USED –
BROWS – anastasia beverly hills brow wiz in “dark brown”, benefitcosmetics “ready set brow” gel, nars radiant creamy concealer in “custard”, jefree star concealer in “C5”
SKIN – nars sheer glow foundation in “gobi” and “Syracuse”, hourglass vanish stick foundation in “bisque”, iconic london illuminator glow in “terracotta bronze”, iconic london “prep set glow” setting spray
POWDERS – Scott barnes blush palette and contour palette, KVD mini shade and light face palette, KVD translucent powder
EYES – l’oreal volume million lashes mascara in “extra black”, beauty bay “nude nude nude” 42 colour palette, KVD tattoo eyeliner, lily lashes in the style “Rome”
LIPS – Napoleon perdis lip liner in the shade “rococo red”, Mac retro matte liquid lip in the shade “carnivorous”, loreal Paris Jlo lipstick in the shade “pure red”
– i do not own any of the music played in this video all rights go to the original creator(s) – Video Rating: / 5
View full lesson: http://ed.ted.com/lessons/how-we-see-color-colm-kelleher
There are three types of color receptors in your eye: red, green and blue. But how do we see the amazing kaleidoscope of other colors that make up our world? Colm Kelleher explains how humans can see everything from auburn to aquamarine.
Talk by Colm Kelleher, animation by TED-Ed. Video Rating: / 5
Brigitte Keener, O.D., optometrist at #MayoClinicFL, demonstrates how to safely and effectively instill eye drops for patients who have prescribed drops for treatment of ocular conditions.
For more information visit http://mayocl.in/ophthalmology or call 904-953-2232
Explore the science of the phenomenon of “floaters,” those tiny blobs that swim across your field of vision.
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Sometimes, against a uniform, bright background such as a clear sky or a blank computer screen, you might see things floating across your field of vision. What are these moving objects, and how are you seeing them? Michael Mauser explains the visual phenomenon that is floaters.
Lesson by Michael Mauser, animation by Reflective Films.
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View full lesson: https://ed.ted.com/lessons/what-are-those-floaty-things-in-your-eye-michael-mauser
Follow my simple, detailed steps to draw a realistic eye in pencil. My method is aimed to help even the most complete beginner draw something they once thought was impossible.
If you get stuck on the shading part, please refer to my shading tutorials below. If you have any questions, leave them in the comments and I’ll get back to you as soon as I can 🙂
HELPFUL LINKS
How to Shade for Beginners: https://www.youtube.com/watch?v=-WR-FyUQc6I
Shading Techniques: https://www.youtube.com/watch?v=tGx4sypoPjY
TOOLS I USED ⬇️
– HB + 4B Mechanical Pencil Lead: https://amzn.to/2EpZx56
– Blending Stump: https://amzn.to/2wcMobn
– Kneadable Eraser: https://amzn.to/2M5tVYV
– Electric Eraser: https://amzn.to/2JYP2t6
– White Gel Pen: https://amzn.to/2EpcMmU
– SmudgeGuard Glove: https://amzn.to/2YLPsr7
– Soft Tissue Paper: https://amzn.to/2JYkjwr
– Canson Drawing Paper (If you want smooth drawings, look for paper labelled as “fine tooth” or smooth, but make sure it’s thick so you can work it): https://amzn.to/2A5saTx
– Ruler
DISCLAIMER
This content contains affiliate links. If you decide to make a purchase through the link, I will make a small commission at no additional cost to you. This helps fund free tutorials on the RFA channel and website. Thank you for your support! Video Rating: / 5
Our topic for today is Human Eye.
The human eye is one of the most valuable sense organs that enables us to see the world around us.
Let us study about the different parts of an eye.
Sclera is a tough outer coat that protects the entire eyeball.
Choroid is a vascular layer of the eye.
It contains blood vessels that nourish the inner parts of the eye.
Cornea is the front portion of the eye.
It is convex in shape and bulges outside.
Light enters the eye through the cornea.
Iris is a dark muscular diaphragm located just behind the cornea.
It regulates the amount of light entering the eye by adjusting the size of the pupil.
Pupil is a hole in the middle of the iris.
Size of the pupil decreases or increases depending upon the intensity of light entering the eye.
It is made up of a transparent jelly like substance, which is made up of proteins.
It is held in position by the ciliary muscles and suspensory ligaments (ciliary zonules).
The ciliary muscles and suspensory ligaments adjust the focal length of the eye so that we can see distant and nearby objects clearly.
The ability of the eye to focus on distant and nearby objects by changing the focal length is called accommodation.
Aqueous humor is a viscous liquid filled in the area between the cornea and eye lens.
It prevents the eye from collapsing due to changes in the atmospheric pressure.
Retina is a delicate membrane having a large number of light sensitive cells.
The light sensitive cells get activated upon illumination and generate electrical signals.
The light sensitive cells are are of two types.
Rods: Cells that respond to the intensity of light.
Cones: Cells that respond to the color of objects.
An inverted real image of the object is formed on the retina.
The electrical signals generated by the cells are sent to the brain through the optic nerve.
The brain reassembles the signals into a meaningful image and gives rise to the sensation of vision.
Vitreous humor is a jelly like substance filled in the space between the retina and the eye lens.
It helps in maintaining the shape of the eye.
Blind spot is a small region in the retina where the optic nerve enters the eye.
It is insensitive to light.
Hence, it is called the blind spot.
Macula is a tiny area in the retina which is responsible for clear and sharp vision.
Fovea centralis is a small area inside the macula.
Here, maximum number of cones are present.
